Shutter-worker



J. H. DAVIDSON.

SHUTTER WORKER.

(N'o Model.)

John 7i. .Daz/idw.

Patented Aug. 4, 1891.

UNITED STATES PATENT OFFICE.;

JOHN H. DAVIDSON, OF FAIRFAX COURT-HOUSE, ASSIGNOR ONE-HALF TO THOMAS T.TAYLOR, OF DUNN LORING, VIRGINIA.

SHUTTER-WORKER.

SPECIFICATION forming part of Letters Patent No. 457,306, dated August4, v1891. Application filed August 4, 1890. Serial No. 360,972. (Nomodel.)

To all whom it may concern.-

Be it known that I, JOHN H. DAVIDSON, a

citizen of the United States, residing at Fair-v fax Court-House, in thecounty of Fairfax and State of Virginia, have invented a new and usefulShUtter-VOrker, of which the following is a specification.

The invention relates to improvements in shutter-workers.

The object of the present invention is to provide a simple andinexpensive device adapted to be readily'secured to a windowframe andshutter and capable of opening and closing the latter and of securelylocking them in their open and closed positions or at any intermediatepoint.

The invention consists of the construction and novel combinationandarrangement of parts hereinafter fully described, illustrated in theaccompanying drawings, and pointed out in the claim hereto appended.

In the drawings, Figure l is a side elevation illustrating ashutter-worker constructed in accordance with this invention applied toawindow frame and shutter, the latter being open. Fig. 2 is a horizontalsectional View. Fig. 3 is a detail View of the leaf of the/hingeprovided with a gear-wheel. Fig. 4 is a detail View of thebearing-plate.

Referring to the accompanying drawings, 1 designates a window casing orframe having secured to it in a suitable recess one leaf 2 of a hingeprovided with a pintle 3, engaging the eye 4 of the other leaf 5, whichis secured toa shutter 6. The leaf 5, which is secured to the shutter,has formed integral with it a gear-wheel 7, the central opening of whichforms the eye of the leaf and is adapted for the reception of the pintle3 of the leaf 2. The gear-wheel 7 of the leaf 5 is engaged by teeth 8 ofa segment 9, which is preferably formed integral with a shaft 10,arranged in a circular opening or bore 11 of the window casing or framel and provided with a longi-v tudinal opening 12. The segment isarranged in a recess 13 of the frame and is provided with acentralprojection 14, which finds bearing in an indentation 15 in the innerface of a bearing-plate 16, secured to the frame or casing 1 andformingda casing for the segment 9 and closing the recess 13. The plate16 is provided with an open slot 17, in which is arranged the adjacentedge or portion'of the periphery of the gear-wheel 7, the teeth of whichmesh with the teeth of the segment, and the shaft 10 .is arranged backor to one side of the vertical plane of the pintle or the center of thegear-wheel 7, and the teeth 1S of the latter are semi-tangentialor arearranged tangential to a circle within the cir- 6o cumference of thegear-wheel 7. This arrangement of the teeth 18 brings them in properposition at the point of meshing with the teeth of the segment 9,whichis mounted upon the shaft 10, that is arranged out of the Vertical planeof the pintle 3, and the angle formed by a tooth and the diameter of thewheel 7 varies according to the distance the shaft is arranged beyondthe vertical plane of the pintle. The opening l2 of the shaft 10 7o isrectangular and is engaged by a squared rod 19, loosely arranged in theopening 12 of the shaft and provided at its outer end with a knob 20,and the squared rod is adapted to be inserted more or less in theopening 12, ac cording to the thickness of the window-frame, therebyenabling the shutter-worker to be readily adjusted to any-sized frame.The inner end or annular portion 2l of the knob 2O is milled or providedon its periphery with a 8o series of teeth 22,arranged to engage similarteeth 23, formed upon the inner face of a cylindrieal recess 24 of aplate 25, which is seated in a recess of the casing and provided withperforations through which pass screws 8 5 that secure the plate to thecasing or frame 1 of the window, and the said knob and squared rod areadapted to be moved longitudinally to carry the teeth 22 of the knobinto or out of engagement with the teeth of the plate 25. 9o Thelongitudinal movement of the rod 19 is limited by a pin 2G, passingthrough the rod and projecting from opposite sides thereof; but the stop2G may be formed by a flange, collar, or the like.

It will readily be seen that the shutterworker is simple andcomparatively inexpensive in construction and is adapted to be 'readilyapplied to a window and be quickly adj usted to the thickness of theframe, and the roo bearingnplate Which forms a easing for the segmentforms' a vguide which enables the parts'to be readily adjusted to theirproper positions.

What I claim is- The combination, in a shutter-worker, of the hingecomprising` the leaf 2, provided with a pintle, and the leaf 5, having`the gear-Wheel provided with a central pintle opening and having itsteeth arranged horizontally on its upper face and at an angle to thediameter, the shaft arranged in a vertical plane parallel to that ofthepintle and provided with a longitudinal opening, the segment formed integral with the shaft and provided with the projecting journal, thebearing-plate having a bearing' -indentation to receive the journal andprovided with a horizontal slot to receive the gear-Wheel, the knobhaving its stem arranged in the opening of the shaft and provided With apin proj eating laterally from the stein to limit the movement of theknob, and

JOHN H. DAVIDSON. Witnesses:

G. M. FOX, A. I. TAYLOR.

